nsNoDataProtocolContentPolicy.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- *//* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is Mozilla Corporation. * Portions created by the Initial Developer are Copyright (C) 2006 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Jonas Sicking <jonas@sicking.cc> (Original Author) * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** *//* * Content policy implementation that prevents all loads of images, * subframes, etc from protocols that don't return data but rather open * applications (such as mailto). */#include "nsNoDataProtocolContentPolicy.h"#include "nsIDocument.h"#include "nsINode.h"#include "nsIDOMWindow.h"#include "nsIDOMDocument.h"#include "nsString.h"#include "nsContentUtils.h"#include "nsIProtocolHandler.h"#include "nsIIOService.h"#include "nsIExternalProtocolHandler.h"#include "nsNetUtil.h"
NS_IMPL_ISUPPORTS1(nsNoDataProtocolContentPolicy, nsIContentPolicy)
NS_IMETHODIMP
nsNoDataProtocolContentPolicy::ShouldLoad(PRUint32 aContentType,
nsIURI *aContentLocation,
nsIURI *aRequestingLocation,
nsISupports *aRequestingContext,
const nsACString &aMimeGuess,
nsISupports *aExtra,
PRInt16 *aDecision)
{
*aDecision = nsIContentPolicy::ACCEPT;
// Don't block for TYPE_OBJECT since such URIs are sometimes loaded by the// plugin, so they don't neccesarily open external appsif (aContentType != TYPE_DOCUMENT &&
aContentType != TYPE_SUBDOCUMENT &&
aContentType != TYPE_OBJECT) {
// The following are just quick-escapes for the most common cases// where we would allow the content to be loaded anyway.
nsCAutoString scheme;
aContentLocation->GetScheme(scheme);
if (scheme.EqualsLiteral("http") ||
scheme.EqualsLiteral("https") ||
scheme.EqualsLiteral("ftp") ||
scheme.EqualsLiteral("file") ||
scheme.EqualsLiteral("chrome")) {
return NS_OK;
}
PRBool shouldBlock;
nsresult rv = NS_URIChainHasFlags(aContentLocation,
nsIProtocolHandler::URI_DOES_NOT_RETURN_DATA,
&shouldBlock);
if (NS_SUCCEEDED(rv) && shouldBlock) {
*aDecision = nsIContentPolicy::REJECT_REQUEST;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsNoDataProtocolContentPolicy::ShouldProcess(PRUint32 aContentType,
nsIURI *aContentLocation,
nsIURI *aRequestingLocation,
nsISupports *aRequestingContext,
const nsACString &aMimeGuess,
nsISupports *aExtra,
PRInt16 *aDecision)
{
return ShouldLoad(aContentType, aContentLocation, aRequestingLocation,
aRequestingContext, aMimeGuess, aExtra, aDecision);
}